Minnesota Mining and Manufacturing Company

Peter D Sills

James B Philip, Jr

Craig Allen Perman

Richard J Loer

Charles G Barlow

James E Lindquist

Peter R Johns

Silver halide photographic emulsions may be sensitized by the use of hydrido-phosphine noble metal compounds and especially platinum (II) compounds.

Noble metal complexes to sensitize silver halide emulsions

5-Substituted-amino-1,2,3,4-thiatriazoles have been found to be supersensitizers for silver halide photographic emulsions spectrally sensitized to the red region of the electromagnetic spectrum.

Supersensitization of red sensitized, silver halide emulsions with

5-substituted-thio-1,2,3,4-thiatriazoles and 5-substituted-oxy=1,2,3,4-thiatriazoles have been found to be supersensitive for silver halide photographic emulsions spectrally sensitized to the red and infrared regions of the electromagnetic spectrum.

Red and infrared films containing

Automatic processing equipment for photographic film, particularly radiographic black-and-white film, are required to handle different brands and constructions of film with the same processing chemistry. The Applicants have found that developer chemistry fluctuations seem to be very high when processing conventional films and newer, lower silver coating weight films. It has been found that the addition of an aqueous soluble, non-photosensitive bromide salt into radiographic film reduces the developer chemistry fluctuations.

Automatically processible photographic element comprising a non-silver

5-substituted-1,2,3,4-thiatriazoles have been found to be supersensitizers for silver halide photographic emulsions spectrally sensitized to the infrared.

Supersensitization of silver halide emulsion

A silver-halide/gelatin light-sensitive emulsion containing a saturated cyclic oxime compound, and optionally containing a di- or trimethylol lower alkane compound is disclosed. The light-sensitive emulsion coated on a substrate is particularly useful as a radiographic film.

Growing community of inventors

Saint Paul, MN, United States of America

Peter D Sills